CN-224233828-U - Intelligent voice box

CN224233828UCN 224233828 UCN224233828 UCN 224233828UCN-224233828-U

Abstract

The application relates to the technical field of electromagnetic shielding of intelligent voice boxes, and provides an intelligent voice box which comprises a box body, a power module, a signal module and a power amplifier module, wherein the power module, the signal module and the power amplifier module are arranged in the box body, a cover plate capable of sealing the upper end of the box body is arranged on the box body, the power amplifier module and the signal module are electrically connected through a signal wire, a metal partition plate is arranged between the signal module and the power amplifier module, the power module and the power amplifier module are electrically connected through a first conductive wire, the signal module and the power module are electrically connected through a second conductive wire, and the signal wire and the first conductive wire respectively penetrate through the metal partition plate. According to the technical scheme provided by the application, the metal partition plate is arranged between the signal module and the power amplifier module, and can partition the magnetic field generated by the power amplifier module, so that the signal interference on the signal module is reduced, the stability of the output audio signal is improved, and the sound distortion is reduced.

Inventors

ZHANG XIN
MA FEI
ZHOU YONGLIANG
QIAN ZHENG
ZHANG ZHIFENG
WANG YUE
YANG YUN
FANG WANGWANG
CHEN GUOYU
ZHOU PENG

Assignees

中煤智能科技有限公司

Dates

Publication Date: 20260512
Application Date: 20250604

Claims (9)

1. The intelligent voice box comprises a box body, a power module, a signal module and a power amplifier module, wherein the power module, the signal module and the power amplifier module are arranged in the box body, a cover plate capable of sealing the upper end of the box body is arranged on the box body, the power amplifier module and the signal module are electrically connected through a signal wire, a metal partition plate is arranged between the signal module and the power amplifier module, the power module and the power amplifier module are electrically connected through a first conductive wire, and the signal module and the power module are electrically connected through a second conductive wire; The power module is used for providing power for the power amplification module and the signal module, the signal module is used for generating an audio signal, and the power amplification module is used for amplifying the audio signal and converting the audio signal into sound; The power amplification module comprises a signal amplification unit, wherein the signal amplification unit comprises a voltage stabilizing circuit and a signal amplification circuit, the input end of the voltage stabilizing circuit is connected to a first conductive wire, and the output end of the voltage stabilizing circuit is connected to the signal amplification circuit; The voltage stabilizing circuit comprises a P-MOSFET, a voltage comparator, a comparison voltage source, a first resistor and a second resistor, wherein the source electrode of the P-MOSFET is connected with the first conductive wire, the drain electrode of the P-MOSFET is connected with the signal amplifying circuit through the first resistor, the grid electrode of the P-MOSFET is connected with the output end of the voltage comparator, the positive input end of the voltage comparator is connected between the first resistor and the second resistor, and the negative input end of the voltage comparator is connected with the stable output end of the comparison voltage source.
2. The intelligent voice box according to claim 1, wherein the power module is arranged on one side of the signal module, the power amplifier module is arranged on the other side of a connecting line of the power module and the signal module, the metal partition plate is connected to one side of the power module, the connection direction of the first conductive wire is perpendicular to the connection direction of the second conductive wire, the first conductive wire is connected to a strong current port of the power module, the second conductive wire is connected to a weak current port of the power module, and the side face of the strong current port is perpendicular to the side face of the strong current port.
3. The intelligent voice box of claim 1, wherein the signal wire comprises a first contact, a second contact and a flat cable, the first contact and the second contact are respectively connected to the head end and the tail end of the flat cable, the first contact is connected to the signal module, the second contact is connected to the power amplifier module, and a through slot for the flat cable to pass through is formed in the metal partition board.
4. The intelligent voice box according to claim 3, wherein the metal partition plate comprises an upper fixing portion and a lower fixing portion, the upper fixing portion is connected to the cover plate, the lower fixing portion is connected to the box body, corresponding notches are formed in the upper fixing portion and the lower fixing portion, and after the cover plate is installed in place, the notches formed in the upper fixing portion and the lower fixing portion are aligned to form through grooves for a signal wire to pass through.
5. The intelligent voice box of claim 4, wherein the cover plate is provided with a guide block, the box body is provided with a guide groove matched with the guide block, and when the cover plate is buckled on the box body, the guide block is matched with the guide groove, so that the upper fixing part and the lower fixing part can be aligned.
6. The intelligent voice box according to any one of claims 1 to 5, wherein the power amplifier module further comprises a sound releasing unit, the power module is connected to the power amplifier module through a first conductive wire, the signal module is connected to the signal amplifying unit through a signal wire for providing an audio signal, and an output end of the signal amplifying unit is connected to the sound releasing unit.
7. The intelligent voice box according to claim 6, wherein the signal amplifying circuit comprises an NPN triode, a third resistor and a fourth resistor, wherein a collector of the NPN triode is connected with the fourth resistor and the sound releasing unit, an emitter of the NPN triode is grounded, a base of the NPN triode is connected with the third resistor and the signal line, and a fourth resistor is connected with a drain electrode of the P-MOSFET.
8. The intelligent voice box according to claim 7, wherein one end of the third resistor is connected to the drain electrode of the P-MOSFET, the other end of the third resistor is connected to the collector electrode of the NPN triode, one end of the fourth resistor is connected to the drain electrode of the P-MOSFET, the other end of the fourth resistor is connected to the base electrode of the NPN triode, the sound release unit and the third resistor are both connected to the collector electrode of the NPN triode, and the signal line is connected to the base electrode of the NPN triode.
9. The intelligent voice box of claim 7, wherein the output end of the signal amplifying circuit is connected to the sound releasing unit, the control end of the signal amplifying circuit is connected to the signal line, the resistance value of the first resistor is 62kΩ, the resistance value of the second resistor is 10kΩ, the output of the comparison voltage source is 3.3V, and the rated operating voltage of the signal amplifying circuit is 24V.

Description

Intelligent voice box Technical Field The application relates to the technical field of electromagnetic shielding of intelligent voice boxes, in particular to an intelligent voice box. Background The statements in this section merely provide background information related to the present disclosure and may not constitute prior art. The intelligent voice box is equipment capable of outputting voice outwards according to feedback information, various in working modes, capable of receiving voice information through a wireless module and playing the voice information through a power amplification module, capable of supporting direct playing after sound recording, and capable of being internally provided with a language processing model and automatically generating and playing the voice information. From the structural view, the intelligent voice box generally comprises a power module, a power amplifier module and a signal module. The power module is responsible for providing power support for the power amplifier module and the signal module, the main function of the power amplifier module is to make sound outwards, and the signal module is used for generating a signal for controlling the work of the power amplifier module. The power amplifier module mainly comprises a power supply, a controller and a loudspeaker, wherein the loudspeaker comprises a coil and a sound piece. The power supply controller enables the coil to generate a changing magnetic force after being electrified by adjusting the magnitude and the direction of current in the coil. Along with the change of the current magnitude and direction, the magnetic field intensity and the direction of the coil correspondingly change, and then the sounding sheet is driven to vibrate and sound. The audio signal generated by the signal module is input to the power controller, and the power controller modulates the required current parameter. In the actual operation process, if the power amplifier module is required to make a loud enough sound, a large current needs to pass through the coil. However, as the coil current increases, the magnetic field leakage is aggravated, and the signal module transmits weak current signals, so that the magnetic field interference causes distortion of the audio signal output by the signal module, and meanwhile, when the audio signal is amplified, a stable voltage source needs to be provided to amplify the audio signal normally. And when the power amplifier module generates high-decibel sound, a large amount of mechanical vibration can be generated, and the mechanical vibration can lead to certain deformation of a circuit structure of the power module connected with the power amplifier module, so that the resistance of the connected part of the power module and the power amplifier module fluctuates, the power supply voltage of the power amplifier module fluctuates, and the amplified audio signal is distorted due to the fluctuation of the power supply voltage when the power amplifier module amplifies the audio signal. Therefore, in practical application, the larger the sound volume of the loudspeaker is, the more obvious the distortion of the sound is. Disclosure of utility model Therefore, the application aims to provide an intelligent voice box, which can solve the technical problems of the background technology. The aim of the application is achieved by the following technical scheme: The intelligent voice box comprises a box body, a power module, a signal module and a power amplifier module, wherein the power module, the signal module and the power amplifier module are arranged in the box body, a cover plate capable of sealing the upper end of the box body is arranged on the box body, the power amplifier module and the signal module are electrically connected through a signal wire, a metal partition plate is arranged between the signal module and the power amplifier module, the power module and the power amplifier module are electrically connected through a first conductive wire, and the signal module and the power module are electrically connected through a second conductive wire; The power module is used for providing power for the power amplification module and the signal module, the signal module is used for generating an audio signal, and the power amplification module is used for amplifying the audio signal and converting the audio signal into sound; The power amplification module comprises a signal amplification unit, the signal amplification unit comprises a voltage stabilizing circuit and a signal amplification circuit, the input end of the voltage stabilizing circuit is connected to the first conductive wire, and the output end of the voltage stabilizing circuit is connected to the signal amplification circuit; The voltage stabilizing circuit comprises a P-MOSFET, a voltage comparator, a comparison voltage source, a first resistor and a second resistor, wherein the source electrode of the P-MOSFET is connected with th